[LLVMdev] Contribute a new precise pointer analysis to LLVM

[Joshua Cranmer 🐧]

On 10/23/2013 7:52 AM, lian li wrote:
> According to our experiments with SPEC, we haven't observed 
> significant impact in terms of execution performance. In our 
> experiments, we run a list of 8 optimizations that require alias 
> analysis (including -licm, -gvn, -bb-vectorize,...), and for each 
> optimization we rerun our analysis so that its result can be used by 
> the optimization pass. The biggest performance improvement we observed 
> is close to 3%, but for some benchmarks we also have a slow down of 
> 2%. The overall performance improvement is less than 0.5%.

Would it be possible to measure performance improvement for a large 
application or two that compiles with -fno-strict-aliasing?

-- 
Joshua Cranmer
Thunderbird and DXR developer
Source code archæologist